We describe an architecture for distributed collaborative visualization that integrates video conferencing, distributed data management and grid technologies as well as tangible interaction devices for visualization. High-speed, low-latency optical networks support high-quality collaborative interaction and remote visualization of large data.
Using internet for media-based real-time collaboration has become widespread activity. In this paper, we present a framework called CoUniverse, designed for building realtime user-empowered collaborative environments to work primarily on high-speed networks with true high-bandwidth applications such as uncompressed high-definition video. The system is… (More)
We describe a high-quality collaborative environment that uses High-Definition (HD) video to achieve near realistic perception of a remote site. The capture part, consisting of a HD camera, Centaurus HD-SDI capture card, and UltraGrid software, produces a 1.5 Gbps UDP data stream of uncompressed HD video that is transferred over a 10GE network interface to… (More)
—This article describes a distributed classroom experiment carried out by five universities in the US and Europe at the beginning of 2007. This experiment was motivated by the emergence of new digital media technology supporting uncompressed high-definition video capture, transport and display as well as the networking services required for its deployment… (More)
This paper presents an automated system for authoring of hypermedia lecture recordings. We revised our previous work on lectures indexation. Our original method of lectures indexation needed a human interaction and was not feasible for large amount of lectures. We developed a system which utilizes Optical Character Recognition (OCR) to automatically extract… (More)
Providing secure, extensible, pervasive and easy to implement collaborative environment for medical applications poses significant challenge for state-of-the-art computer systems and networks. In this paper, we describe such a collaborative environment developed for Ithanet project, based on Grid authentication mechanisms. Significant effort has been put… (More)
Except where otherwise indicated, this thesis is my own original work. ACKNOWLEDGMENTS I would like to express my gratefulness to prof. Luděk Matyska and dr. Eva Hladká for supporting me in my work a motivating me. I would also like to thank the fellows at the Laboratory of Advances Networking Technologies: Lukáš Hejtmánek, Tomáš Rebok, Miloš Liška, Jiří… (More)
základní návrh systému, posléze jeho rozšíření a byla započta jeho realizace.
Introduction: Enabled by current high-speed networks, high-definition (HD) video transmissions have become an essential tool for many applications. The HD video brings resolution, which is more than 4x larger than common PAL resolution, thus capturing more details and increasing the image quality dramatically. In this paper, we focus on using the HD video… (More)